Improvement in machines for cutting moldings on marble



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B. ARDBEY. lachinessfur Cutting Moldings on Marble, &c. Patented Feb.3,1874.'

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R. ABDREY.

Machines for cuttin Moldings on Marble, etc. N0.l47,032. Patented Feb.3,1874.

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Patented Feb. 3,1874;

Mina-Pea 1 able. culiar mechanism whereby, when the end or tion of the'molding.

NITED STAT PATENT ROBERT ARDREY, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN MACHINES FOR CUTTING M'OLDINGS O'N MARBLE, &c.

Specification forming part of Letters'Patent No. 147,032, dated February 3, 1874; application-filed September 22, 187 3.

To all whom it may concern:

Be it known that I, ROBERT ARDREY, of Philadelphia, in the county of Philadelphia and'State of Pennsylvania, have invented certain new and useful Improvements in Machines for'Cutt-ing Moldings on Marble and Stone; and I do hereby declare the following to be a full, clear, and exact description of the' inventiomsuch' as will enable others skilled in 'theiart to which it pertains to make and use -it,'referenee being had to the accompanying drawings, which form part of this specification, in whichcutting moldings on marble and stone; and it consists inthe construction and novel arrangement of the carriage which holds the plate of marble or stone; the devices whereby said carriage is caused'to'move forward and backwardinfront of the cutter; and the mechanism whereby the cutter is caused to move to and-fro in conformity with the outline of the plate orstone, and otherwise rendered adjust- This invention comprises also the peside edge of the plate or stone is reached during the operation of the machine, the cutter may be made to travel along said end or side edge, to form thereon the required continua- Said invention likewise, andfinally, consists inthe provision made in the construction of the machine for carriages the main frame 'or table, upon which all the workingparts of the machine are supported.

B designates a guide for the movable carriage, which supports and carries the plate of marble or stone. This guideis arranged upon the surface of the frame or table A trans- -versely,-and is secured thereto by means of the lugs a. A dovetailed ridge, a is formed on the upper side of the guide in the direction of its length, and is embraced by'the beveled cleats a on the under side of the carriage. The ridge and cleats retain the carriage in its proper relation-to the cutter while said carriage is traveling. G designates a toothed rack, attached to the rear edge of the carriage, and en gaging with a pinion, 1), through the medium of which motion is givento the carriage, causing it to travel to and fro in front of the cutter. This pinion is on the upper end of a verticalshaft, b journaled in the frame A, and'holding, nearits lower end, a pinion, N, which engages with'a worm, 11 ona horizontal shaft, 1). The shaft Dis laterally adjustable, so that the worm and worm-wheel may be'connected and disconnected at will. One end of said sha'ftisloosely journaled to the main frame A, while the other end is journaled toa lever, D which is pivoted to said frame, and which is employedv in controlling the engagement'of said'worm and'worm-Wheel. The plate upon which the molding is to'be cut is secured rigidly to the carriage by means of the screws E, having their bearings in brackets E, secured to the rear part of the "carriage, and projecting, as shown, overthe surface of said plate. The front and side or-end edges of the carriage are curved, as shown, or otherwise to conform to the curvature of the plate, which, when placed thereon, is flush, or nearly so, with said carriage. Agroove, F, is-formed in the under side of the carriage, which groove coincides with the'outline of the front and side edgesof the carriage, close-to running lengthwise of, andsecured to, the top of the main frame A. The cutter, indicated bythe letter B is secured to the -upper end of.

a'vertical shaft, h, which has its hearings in a bracket, h which bracket carries the horizontal shaft-bearing k formedat the lower "end of a curved arm, M, and the screw-box hi, which is hinged to the arm h projecting latcrally from said bracket, as shown. Upon the lower end of .the cutter-shaft h is fixed the beveled pinion I, which engages with a beveled spur-wheel, 1 on the end of a horizontal shaft, i, which is journaled to the bearing 7L2 at its inner end. The shaft 2" is the main shaft of the machine, and from it rotary motion is given to the cutter through the medium of the beveled wheels I This shaft is so arranged that it may move lengthwise through its outer bearing in the frame A, in order to allow the cutter to adjust itself to the curvatures of the plate. A crank or balance wheel, J, and a worm, J are fitted to said main shaft, which is grooved lengthwise, and said worm and wheel keyed thereto in such a manner that they and the shaft will turn together, while at the same time the shaft may be moved lengthwise without disturbing their arrangement. The worm J engages with a toothed wheel, J attached to a horizontal transverse shaft, K, which has its bearings in the standard K and bracket K and which carries 011 its ends respectively, the beveled pinion L, and beveled spur-wheel L The wheel L engages with a pinion, L on the shaft D, and thereby communicates motion to said shaft. Thepinion L engages with one, L on the lower end of the vibrating shaft M, which has its bearings, respectively, in the top of the standard K and the horizontal bar M said bar being arranged to slidein the direction of its length through the boxes or guides m, secured to the beams of the main frame. This bar is moved by means of a suitable lever, m having one end attached thereto, and being fulcrumed to the main frame, as shown. The obj ect in having the sh aft M, as described, is to enable the pinion m on its upper end'to'be thrown alternately in and out of gear with the beveled wheels M M or in and out of gear with either. The wheels M M are secured to a screw-shaft, N, running lengthwise of the frame A and having its jonrnal-bearin gs in boxes n n. The threaded portion of said screw-shaft passes through the screw-box h, which may be swung down on its hinges and displaced from the screw-shaft, but which is brought and held in connection with said shaft when it is desired to cause the cutters to travel along the side edges of the plate or slab, in which event it is obvious that the rotation of the shaft or screw will cause said box to move in the direction of its length, the course of said box depending on whichever of the wheels M M the pinion m is thrown in gear with. Thus, when said pinion actuates the wheel M the box, and through the medium thereof the cutter, travels toward the rear edge of the plate, or vice versa when the pinion rotates the wheel M*. N designates a slot in the top of the frame A, through which passes the upper part of the bracket h holding the cutter-shaft, said slot being formed to allow the cutter to move to and fro, for the purpose hereinbefore described. The traveler c is a vertical pin or spindle provided with an anti-friction roller, which enters the groove in the under side of the carriage.

The shank or body of said traveler has its'middle portion fitted into a slot, 0 in the end of the bed-plate G, where its vertical movement is prevented by the collars 0 The slot 0 is designed to allow the traveler to be accurately adjusted to the groove in the under side of the carriage, which adjustment is accomplished by means of the sliding frame 0, through the forward end of which the upper part of the trav eler-shank passes, and an adjusting-screw, 0 which has its thread-bearing in the rear end of the frame 0 and its fixed bearing in the box 0 attached to the plate G, a pin being inserted in said box and entering a groove in the shank of the screw, to prevent longitudinal movement of said screw. It is obvious that when the screw is turned the frame 0, and with it the traveler, may be adjusted according to requirements. The frame 0 is slotted or made open, so as to include the upper part of the bracket M.

The foregoing description has reference to a machine of which the carriage and the devices for giving the latter motion, as well as certain mechanism for controlling the movement of the cutter, pertain to the work of cutting moldings on plates of irregular outline, such, for instance, as shown in Fig. 3 of the accompanying drawings. To adapt the machine, however, to the work of cutting moldin gs on more regular forms, such as ovals and the like, the moldings on which are continuous, a table, 1?, correspond ing to the outline of the slot, is substituted for the carriage already described. This table, as shown in Fig. 4, is supported upon the upper end of a vertical shaft, having its bearings in the frame A. Rotary motion is given to the table through the medium of a toothed wheel, P, on the shaft P, with which engages the worm 12 The plate to be cut is secured to the table by means of the screw P having its bean in g in the frame P substituted for the brackets E and by the dowelpins p p projecting upward from the table and entering suitable openings therein. The frame P is secured to the frame A, as shown. The under surface of the table is grooved to receive the traveler e.

The operation of forming the molding on a stone of oval or other equivalent unbroken outline is continuous, the screw-box 7L and de vices pertaining to the movement of the same not being required for such operation.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The bracket 7L1, carrying the rotary cutter H and screw-box h, in combination with the screw-shaft N, said screw-shaft and the cuttershaft being arranged at right angles to each other, substantially as and for the purpose specified.

2. The combination of the horizontal screwshaft N, vertical cutter-shaft 7L, screw-box hr, bracket 7L right and left gearing M M, and laterally-adjustable pinion m substantially as shown and described.

3. The sliding bar M and lever m in com bination with the vibrating or. adjustable shaft ing adjustable independently of the cutter,

substantially as shown and described.

5. The combination of the laterally-adjustable shaft 1), main shaft 2 intermediate con nections J J 2 K L lever D vertical shaft b and adjustable Worm b with a marble-molding machine, substantially as specified.

In testimony that I claim the foregoing I have hereunto set my'hand this 5th day of. September, 1873.

ROBERT ARDREY.

Witnesses T. A. GONNOLLY, EUGENE P. EADSON- 

